JPS5932720B2 - drain trap - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in drain traps.

A pilot-type drain trap in which a pilot valve is opened and closed by floating and sinking a packet-shaped float, and a piston valve is accordingly opened and closed, was developed in Utility Model Opening in 1988, for example.
5225 and other publications, in the conventional pilot type drain trap, the sliding part of the piston valve is constructed very precisely, as this publication has already pointed out the problem. Unless water leaks from the moving parts, it would be impossible to induce the piston valve to open and close due to the pressure balance between the opening and closing of the pyro valve.

Therefore, in the idea described in the above publication, a screen is installed at the inlet of the drain to prevent dirt from entering the main body, thereby eliminating trouble with the sliding part of the piston valve. Therefore, there was a risk that the sliding movement of the piston valve would become heavy.

The purpose of the drain trap of the present invention is to provide a drain trap that can eliminate the sliding part of the valve as described above, eliminate the possibility of troubles caused by dirt, and that can always operate smoothly. It is something that

In order to achieve the object, the present invention has a lid plate that seals the upper opening of a main body, which has an inlet for the drain to flow in on one side and an outlet for the drain to flow out on the other side. A packet-shaped float with an open upper surface is arranged in the float chamber so as to be able to rise and fall freely, and a valve seat body is suspended from the center of the bottom surface of the lid plate, and the outlet and the bottom of the valve seat body are located at the center of the bottom surface of the valve seat body. At the same time, a drain inlet hole is opened on the same lower surface of the valve seat body so that the drain discharge hole is flush with the drain discharge hole at an outer position of the drain discharge hole, and a cover tube is attached to the valve seat body. By fixing, a valve chamber is formed below the valve body, and a disk-shaped main valve body facing the drain discharge hole and drain inflow hole is disposed in the valve chamber so as to be movable up and down. A small-diameter leak hole communicating with the drain discharge hole is provided in the center of the valve body, a vertical hole is provided in the center of the bottom wall of the valve chamber, and an opening/closing inducing frame is erected at the center of the inner bottom surface of the float, and the opening/closing The opening/closing inducing frame is loosely inserted into the valve chamber from the vertical hole and oriented so that the upper end of the opening/closing inducing frame can close the leak hole of the main valve body, and the opening/closing inducing frame has an opening/closing inducing frame on the outer periphery. A partially large diameter portion is formed so as to face the gap with the inner periphery of the vertical hole when the frame is lowered, and a horizontal hole communicating with the drain inflow hole is formed in the valve seat body, and the horizontal hole An outer cylinder is fixed to the valve seat body so that a water passage gap communicating with the valve is formed on the outer periphery of the cover cylinder, and the lower end opening of the outer cylinder is opposed to the inner bottom surface of the float. Since the main valve body can close the drain discharge hole and the drain inflow hole with its upper surface, the outer periphery of the main valve body can be formed with a sufficient clearance from the inner wall of the valve chamber. This allows the sliding portion of the main valve body to operate reliably over a long period of time without any trouble caused by unnecessary dirt or debris.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a main body having an inlet for drain inflow on one side and an outlet 3 for drain outflow on the other side.The upper opening of the main body is sealed with a cover plate 5 fixed with bolt nuts 4, and the internal cavity is covered with a float. Room 6 and eggplant.

The cover plate 5 is formed with an outflow passage 7 communicating with the outlet 3.

A packet-shaped float 8 having an open upper surface is arranged in the float chamber 6 so as to be movable up and down.

A hollow connecting pipe 9 is provided vertically at the center of the lower surface of the lid plate 5, and a valve seat body 10 is fixed to the lower end of the connecting pipe, so that the valve seat body 10 is suspended into the float chamber 6.

The valve seat body 10 has a connecting pipe 9 and an outflow passage 7 at the center of its lower surface.
A drain outlet hole 11 is opened which communicates with the outlet 3 through the drain outlet hole 11, and a drain inlet hole is provided on the same lower surface of the valve seat body 10 so as to be flush with the drain outlet hole 11 at the outer periphery of the drain outlet hole 11. 12 is opened.

The cover tube 1 is inserted into the thread groove 13 formed on the lower outer periphery of the valve seat body 10.
A valve chamber 15 is formed below the valve seat body 10 by screwing and fixing the upper part of the valve seat body 10.

A drain discharge hole 11 and a drain inflow hole 1 are provided in the valve chamber 15.
A disk-shaped main valve body 16 facing the valve body 2 is disposed so as to be movable up and down.

A small-diameter leak hole 17 is provided in the center of the main valve body 16, and the lower half of the leak hole 17 is formed in a funnel shape.

A vertical hole 18 is formed in the center of the bottom wall of the valve chamber 15.
The inner diameter of the upper portion 18a is slightly larger than that of the lower portion 18b with the step portion 19 as a boundary.

Reference numeral 20 denotes an opening/closing inducing frame erected at the center of the inner bottom surface of the float 8. The lower end screw portion of the opening/closing inducing frame 20 is passed through the bottom wall of the float 8, and a nut 21 is tightened and fixed from the lower surface.

The opening/closing inducing frame 20 is loosely inserted into the valve chamber 15 through the vertical hole 18 so that the conical portion 22 at the upper end of the opening/closing inducing frame 20 faces the leak hole 17 of the main valve body 16.

In addition, a labyrinth-like partial large diameter portion 23 is formed on the outer periphery of the opening/closing inducing frame 20, and when the opening/closing inducing frame 20 is lowered, the partial large diameter portion 23 approaches the stepped portion 19 and the inner periphery of the vertical hole 18. The structure is designed so that the gap between the

Further, a horizontal hole 24 communicating with the drain inflow hole 12 is formed in the valve seat body 10, and the end of the horizontal hole 24 is opened at the outer periphery of the valve seat body 10.

A threaded groove 25 is formed on the upper outer periphery of the core horizontal hole 24 of the valve seat body 10, and the upper end of the outer cylinder 26 is screwed and fixed into the threaded groove 25.
A water passage gap 27 communicating with the horizontal hole 24 is formed on the outer periphery of the cover tube 14.

The lower end opening 28 of the outer cylinder 26 is opposed to the inner bottom surface of the float 8.

In the drain trap configured in this way, the drain flowing in from the inlet 2 accumulates in the float chamber 6 and floats the float 8.

As the accumulation of drain progresses, the float 8 continues to float.

The conical portion 22 at the tip of the opening/closing inducing frame 20 is connected to the main valve body 16.
is pushed up and brought into close contact with the lower surface of the valve seat body 10, thereby blocking the leakage hole 17 and at the same time stopping the floating of the float 8.

When the drain flows into the float chamber 6, the drain flows into the float 8 from the upper end opening of the float 8 which has stopped floating.

At this time, the valve chamber 15, drain hole 12, side hole 24, water passage gap 27, etc. are filled with the drain that has already flowed in first.

When a large amount of drain flows into the float 8 from its upper end opening and the float 8 becomes heavy, the float 8 sinks and the opening/closing inducing frame 20 also descends, so that the leak hole 17 opens.

If the leak hole 17 is opened, the drain inside the valve chamber 15 will flow through the leak hole 1.
7 and flows out into the drain discharge hole 11.

Drain is sucked into the valve chamber 15 through the vertical hole 18 to compensate for the outflow amount, but as the opening/closing inducing rod 20 descends, its partially large diameter portion 23 is brought into contact with the inner periphery of the vertical hole 18. Since the gap is made smaller, the pressure in the valve chamber 15 is reduced by the opening/closing induction rod 2.
As 0 descends, it becomes lower.

When the pressure in the valve chamber 15 decreases, the upward pressing force acting on the lower surface of the main valve body 16 decreases, while the pressure reduction blade of the drain fluid acts on the upper surface of the main valve body 16 at the drain inflow hole 12. Therefore, when the main valve body 16 descends to the extent that the opening/closing inducing rod 20 is formed, it separates from the lower surface of the valve seat body 10 and descends.

Therefore, the drain discharge hole 1L and the drain inflow hole 12 are opened, and the drain that has been in the drain flow hole 12 is discharged from the drain discharge hole 11 through the connecting pipe 9 to the outlet 3.

Thus, the drain inside the float 8 is sucked into the lower end opening 28 and flows out of the vessel through the water passage gap 27, the horizontal hole 24, the drain inflow hole 12, and the drain discharge hole 11.

When the drain inside the float 8 flows out, the float 8 becomes lighter and floats up, the opening/closing inducing rod 20 rises, and the conical part 22 touches the main valve body 16.
At the same time as pushing up, the partial large diameter portion 23 expands the gap between the vertical hole 18.

Therefore, the pressure within the valve chamber 15 increases, and the main valve body 16 is brought into close contact with the lower surface of the valve seat body 10.

In this way, when the amount of inflow of the drain increases, the float 8 sinks again and the above-described operation is repeated thereafter.

As described above, the drain trap of the present invention is configured such that the drain discharge hole and the drain flow hole are formed flush with each other on the lower surface of the valve seat body, and the disc-shaped main valve body is opposed to this. The main valve body does not have to slide airtight within the valve chamber.

Therefore, the main valve body can move up and down smoothly without receiving any sliding resistance, and it is also possible to avoid dust from getting caught in the sliding part, impairing its movement and causing problems. It is something.

[Brief explanation of the drawing]

The drawings show one embodiment of the drain trap of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is an enlarged longitudinal sectional view of the main part, and FIG.
The figure is a sectional view taken along the It-1 line in Figure 2, and Figure 4 is the IV in Figure 2.
-IV line sectional view, and FIG. 5 is a VV line sectional view of FIG. 1...Main body, 2...Entrance, 3...
... Outlet, 5 ... Lid plate, 6 ... Float chamber, 8 ... Float, 10 ... Valve seat body, 11
...Drain discharge hole, 12 ...Drain flow hole, 14 ... Cover tube, 15 ... Valve chamber, 16 ... Main Valve body, 17... Leak hole, 18... Vertical hole, 20... Opening/closing induction rod, 23... Partial large diameter portion, 24... ...Horizontal hole, 26...Outer cylinder, 27...Water passage gap, 28...Lower end opening.

Claims (1)

[Claims] 1. The upper opening of the main body, which has an inlet for the drain to flow in on one side and an outlet for the drain to flow out on the other side, is sealed with a lid plate, and the inner cavity of the main body is used as a float chamber, and the upper surface is placed in the float chamber. A packet-shaped float with an opening is arranged to be able to rise and fall freely, a valve seat body is suspended from the center of the lower surface of the lid plate, and a drain discharge hole communicating with the outlet is opened at the center of the lower surface of the valve seat body, and A drain inflow hole is opened on the same lower surface of the valve seat body so as to be flush with the drain discharge hole at an outer position of the drain discharge hole, and a cover tube is fixed to the valve seat body, so that the valve seat body A valve chamber is formed on the lower side, and a disk-shaped main valve body facing the drain discharge hole and the drain inflow hole is disposed in the valve chamber so as to be movable up and down, and the drain discharge hole is disposed in the center of the main valve body. A small diameter leak hole communicating with the hole is provided, a vertical hole is provided in the center of the bottom wall of the valve chamber, an opening/closing inducing rod is erected at the center of the inner bottom surface of the float, and the opening/closing inducing rod is inserted into the valve chamber from the vertical hole. The opening/closing inducing rod is inserted loosely into the chamber and facing each other so that the upper end of the opening/closing inducing rod can close the leakage hole of the main valve body, and a vertical hole is formed on the outer periphery of the opening/closing inducing rod when the opening/closing inducing rod is lowered. A partially large-diameter portion is formed so as to face a gap with the inner periphery of the valve seat body, and a horizontal hole communicating with the drain inflow hole is formed in the valve seat body, and a water passage gap communicating with the horizontal hole is formed in the valve seat body. A drain trap characterized in that an outer cylinder is fixed to the valve seat body so as to be formed on the outer periphery of the cylinder, and the lower end opening of the outer cylinder is opposed to the inner bottom surface of the float.